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Pixel array substrate

a technology of pixel array and substrate, applied in the field can solve the problems of pixel array substrate b>100/b> malfunction, easy damage to important circuits or elements, etc., and achieve the effect of less circuit region

Inactive Publication Date: 2012-12-11
CHUNGHWA PICTURE TUBES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0044]In the pixel array substrate of the present invention, the dummy pixel unit further has the function of providing protection against electrostatic discharging. Therefore an additional electrostatic discharging protection element in the circuit region is not required. This increases flexibility in the circuit layout of the circuit region.

Problems solved by technology

When an electrostatic discharging phenomenon occurs, important circuits or elements on the pixel array substrate 100 may be easily damaged.
Particularly, electrostatic charges accumulate easily on the ends of the scan lines SL and the data lines DL, making them especially prone to point discharging.
The instantaneous high voltage from point discharging often causes short circuits in the scan lines SL and the data lines DL, leading to malfunction of the pixel array substrate 100.
However, this method requires more space for a circuit layout of circuit region 114.

Method used

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first embodiment

[0046]FIG. 2 is a schematic diagram of a pixel array substrate according to the first embodiment of the present invention. Referring to FIG. 2, a pixel array substrate 1000 comprises a substrate 110, a plurality of scan lines SL and data lines DL, a plurality of display pixel units 120a and a plurality of dummy pixel units 1200. The substrate 110 comprises a pixel region 112 and a circuit region 114 adjacent to the pixel region 112. The scan lines SL and data lines DL are disposed in the pixel region 112 of the substrate 110. An end of each of the scan lines SL and an end of each of the data lines DL extend into the circuit region 114, and are electrically connected to elements of a gate driving circuit region 132 and a source driving circuit region 142. Each of the display pixel units 120a comprises a TFT 122 and a pixel electrode 124, and each of the display pixel units is electrically connected to the corresponding scan line SL and the corresponding data line DL.

[0047]In addition...

second embodiment

[0061]The present embodiment is approximately identical to the first embodiment, and same or similar reference numerals used in the present embodiment and in the first embodiment represent the same or similar elements. Here in the present embodiment a display pixel unit and a dummy pixel unit 2200 on a pixel array substrate are disposed in approximately the same ways as in the first embodiment, so a relevant description is omitted.

[0062]FIG. 5A is a schematic diagram of a single dummy pixel unit of a pixel array substrate according to the second embodiment of the present invention. FIG. 5B is a schematic diagram of an equivalent circuit of the single dummy pixel unit in FIG. 5A. Referring to both FIGS. 5A and 5B, each of the dummy pixel units 2200 of the present embodiment comprises a data line DL, a scan line SL, a first switching element 2230, a second switching element 2240, a first pixel electrode 2280, a third switching element 2250, a fourth switching element 2260, a second pi...

third embodiment

[0068]The present embodiment is approximately identical to the second embodiment, and same or similar reference numerals used in the present embodiment and in the second embodiment represent the same or similar elements. A description of the same elements is therefore omitted.

[0069]FIG. 6 is a schematic diagram of an equivalent circuit of a single dummy pixel unit in a pixel array substrate according to the third embodiment of the present invention. Referring to FIG. 6, the difference between the present and second embodiment is that one end 3232 of a first switching element 3230 is connected to a scan line SL.

[0070]When an electrostatic current S is transmitted from the scan line SL, the electrostatic current S is transmitted through the first switching element 3230 and the second switching element 2240 to a common line CL and is dissipated. In addition, the electrostatic current S may also be transmitted from the fourth switching element 2260 and the third switching element 2250 t...

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Abstract

A pixel array substrate includes a pixel region and a circuit region adjacent to the pixel region. A plurality of display pixel units are disposed in the pixel region and a plurality of dummy pixel units are disposed in the circuit region. Each of the dummy pixel units includes a data line, a scan line, a plurality of switching elements and a plurality of pixel electrodes. The switching elements are electrically connected to the scan line and data line. The pixel electrodes are electrically connected to the switching elements. Particularly, electrostatic currents in the pixel region can be dissipated by the dummy pixel units in the circuit region. The dummy pixel units preserve the continuity of electricity in the pixel array substrate and function as an inner short ring. Therefore, the area of the circuit region on the pixel array substrate is larger.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of Taiwan application serial no. 97132574, filed on Aug. 26, 2008. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a pixel array substrate, and particularly to wherein an area of a circuit region is larger.[0004]2. Description of Related Art[0005]In recent years, with the progressive manufacturing techniques in optoelectronic and semiconductor fields, flat panel displays are growing rapidly, wherein liquid crystal displays (LCDs) have become the mainstream due to its low operating voltage, no radiation, light weight and small volume.[0006]A conventional LCD mainly includes an LCD panel and a back light module, wherein the LCD panel generally comprises a thin film transistor (TFT) pixel array substrate, a color filter (...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G02F1/1368G02F1/1333
CPCG02F1/136204G09G3/3648G09G2330/04G09G2300/0413
Inventor KANG, LIANG-HAOCHANG, YANG-HUI
Owner CHUNGHWA PICTURE TUBES LTD